Merge bitcoindevkit/bdk-cli#201: Docs: add `just` example for using bdk-cli with...

2524da3a128a0adf9d441b945c727c7a4c247ec2 docs: reformat and simplify README steps for just & bitcoind (Steve Myers)
b289a61bcd97de4a8004d17d71bd29771af46d90 fix clippy warnings (Vihiga Tyonum)
c2573fcf33f6a6d7b121f438e6794eaa15f96059 docs: update README steps for `just` & `bitcoind` (Vihiga Tyonum)

Pull request description:

  ### Description

  Fixes #199

  Update README to show how to use `just` command runner to start, connect and fund your bdk-cli wallet with local bitcoind regtest node.  Also, fixed clippy warnings.

  ### Checklists

  #### All Submissions:

  * [x] I've signed all my commits
  * [x] I followed the [contribution guidelines](https://github.com/bitcoindevkit/bdk-cli/blob/master/CONTRIBUTING.md)
  * [x] I ran `cargo fmt` and `cargo clippy` before committing

ACKs for top commit:
  notmandatory:
    ACK 2524da3a128a0adf9d441b945c727c7a4c247ec2
  tvpeter:
    ACK 2524da3a128a0adf9d441b945c727c7a4c247ec2

Tree-SHA512: bf177a651cf97b18b183d56f3d6a7b439a95fbcfd0343b6b9bd422fdc828183555d8afcb057531a2ebca67892a0cbebba32de62e00e343d78082a3f92c95e74e